Aquarium stand



FIG. 1 is a perspective view of an aquarium stand showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an end right view thereof; and

FIG. 5 is a bottom view thereof.

The broken line representation of a support surface in FIG. 1 is for purposes of illustration only. 

The ornamental design for an aquarium stand, as shown and described. 